It will work, but maybe not quite as you expected. Depending on how it's done, the evidence may be visible for years to come. The time for the trunks to fuse depends on the rate of growth, which in turn depends on your growing environment. Could be 2-5 years, and some trunks might die back if they don't get sustainable growth (as in the interior of the bundle).
Don't forget the
Golf Ball! 
Good luck!
Matt